MathJax Cheatsheet

This is a cheat sheet on which code / markdown notation leads to which MathJax output.

MathJax is an open-source JavaScript display engine for LaTeX, MathML, and AsciiMath notation that works in all modern browsers.

When using MathJax inside Obsidian.md the markdown code representing the MathJax formula needs start and end with the dollar sign, i.e.: $a_1..a_n$

Cheatsheet

Description	Example	LaTeX Code / Markdown
Subscript	$a_1..a_n$	a_1..a_n
Double Subscript	$r_{0_1}+r_{0_2}+...+r_{0_n}$	{r_{0_1}​​ + r_{0_2} ​+ ... + r_{0_n}
Superscript / Exponent	$a^2+b^2=c^2$	a^2 + b^2 = c^2
Overline one character	$\bar{a}$	\overline a
Overline multiple characters	$\overline{AB}$	\overline {AB}
Matrix with Parentheses	$\left(\begin{array}{cc}0& 1\\ 1& 0\end{array}\right)$	\begin{pmatrix} 0 & 1 \\ 1 & 0 \end{pmatrix}
Complex Matrix with Parentheses	$\left(\begin{array}{ccc}& Bob& Alice\\ Bob& 0& 1\\ Alice& 1& 0\end{array}\right)$	\begin{pmatrix} & ​Bob & Alice \\ Bob & 0 & 1 \\ Alice & 1 & 0  \end{pmatrix}

Sources

I found the following sources which helped me out:

• https://de.wikipedia.org/wiki/Liste_mathematischer_Symbole (German)
• https://en.wikipedia.org/wiki/Glossary_of_mathematical_symbols
• https://math.meta.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference
• https://easy-copy-mathjax.nakaken88.com/en/matrix/
• https://jojozhuang.github.io/tutorial/mathjax-cheat-sheet-for-mathematical-notation/
• https://bearnok.com/grva/en/knowledge/software/mathjax